Celebrate 'Earth Month' with NASA

Staff, SPACE.com | April 12, 2013 05:57pm ET

This image of Asia and Australia at night is a composite assembled from data acquired by the Suomi NPP satellite in April and October 2012. The new data was mapped over existing Blue Marble imagery of Earth to provide a realistic view of the planet.Credit: NOAA/NASA/SuomiNPP

NASA officials are also featuring ways that people on the planet can sustain it. From arctic sea ice decline to Tropical Storm Isaac, the space agency's Earth Month website gives users information about how to help their home planet.

Earth Day is celebrated annually on April 22.

Earth Quiz: Do You Really Know Your Planet?

You live here, so we figure you ought to be well grounded in Earth facts. But you might find these questions a little tough and tricky. Good luck!